Mechanical movement for converting rotary motion into reciprocating movement



W. A. TRAUT MECHANICAL MOVEMENT FOR GONVERTNG ROTARY MOTION INTO RECIPROCATING MOVEMENT Dec. 7, 1948.

Filed June 24, 1944 I N VEN TOR.

m W n J A 5 am l 4 3 z KM Dec. 7, 1948. w. A. TRAUT 2,455,626

MECHANICAL MOVEMENT FOR CONVERTING ROTARY MOTION INTO RECIPROCATING MOVEMENT Filed June 24, 1944 4 Sheets-Sheet 2 I /a l 37 Z3` /9 ZO 2a 30 1 lJ Z6 S 1. I l r /f' Z5 "W "QL INVENTOR.

Mm/XM H 7 TOE/VE V15' sn-94 i7 #8, 6 8 ff er Dec. 7, 1948. w. A; TRAUT 2,455,626

MECHANICAL MOVEMENT FOR CONVERTING ROTARY MOTION INTO RECIPROCATING MOVEMENT Filed June 24. 1944 4 sheets-sheet s I N VEN TOR.

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Dec. 7, 1948. w, A, TRAU-r 2,455,626

MECHANICAL MOVEMENT FOR coNvEETTNG ROTARY MoTToN INT0 RECITEOCATTNG MOVEMENT Filed June 24, 1944 T 4 Sheets-Sheet 4 H7 TURA/E545 Patented Dec. 7, 1948 MECHANICAL MOVEMENT FOR CONVERT- ING ROTARY MOTION INTO RECIPROCAT- ING MOVEMENT William A. Traut, Wauwatosa, Wis., assignor to Milwaukee, Wis., a corpo- Blackhawk Mfg. Co.

ration of Wisconsin Application june 24, 1944, seriaiNu. 541,946

(ci. 'x4-45) 8 Claims. l

The present invention relates generally to improvements in the art of power transmission, and relates more specifically to improvements in the construction and operation of mechanical movements for converting rotary motion into recipro- 1eating or vibratory movement of a" definite patern.

The primary object of this invention is to provide a new and useful mechanical movement which is simple and compact in construction, and which is moreover efficient in operation and flexible in its adaptations.

Many different types of mechanical movements for converting motionfrom one form into another, `have heretofore been proposed and utilized for diverse purposes, and while some of these prior devices have proven relatively satisfactory for their intended purposesfthere is still great need for a compact and durable motion and power transmitting device for converting high-speed rotary motion into vibratory movement without excessive wear, heating and loss of power. Such a motion transmitter is especially useful for driving portable cutting and polishing tools, pumps, vibrators, and the like with the aid of a flexible shaft rotatable by an electric motor or from some other source of high speed rotary motion; and since it is desirable to manipulate portable implements of this type by hand, and to have the motion converter disposed as near -to the work as possible, the mechanical movement should function with minimum vibration and as smoothly and quiet as possible.

It is therefore a more specific object of my presentinve'ntion to provide an improved mechanical power and motion transmitting mechamanipulated.

nism which embodies all of the above mentioned desirable features, and which is therefore especially adapted for use in connection with portable manually controlled implements or devices.

Another specific object of the invention is to provide a simple and unique rotary motion converter which is particularly adapted to transfer relatively high speed rotation from a rotary element, and to convert such rotation into reciprocating or vibratory movement at one or more points of utilization of the converted movement.

Still another specific object of this invention is to provide an extremely compact but powerful mechanical motion transmitter for converting rotary into reciprocating movement, and which may be readily constructed, assembled or dismantled, thus making all parts readily accessible for inspection and adjustment.

A further specific object of the present invenmanufactured at moderate'cost and conveniently These and other specific objects and advan tages of my present improvement will be apparent from the following detailed description. A clear conception of the several features constituting the invention and ofthe mode of constructing Yand operating several types of mechanloal movements embodying the improvement, may be had by referring to the drawings accompanying and forming a part of this specification wherein like reference characters have been employed to designate similar parts in the various views.

Fig. 1 is a central longitudinal vertical section through a simplev embodiment of the invention applied to a portable reciprocable sanding or polishing shoe, showing` the shoe at one extreme end of its reciprocatory motion;

Fig. 2 is a similar section through the saine assemblage but showing the shoe at the other extreme end of its reciprocation; g

Fig. 3 is a central longitudinal section through a typical coupling for connecting the mechanical movement to a source of rotary motion;

Fig. 4 is a transverse vertical section-through the assemblage of Figs. 1 and 2, the section being taken along the line 4--4 of Fig. 1;

Fig. 5 is a central longitudinal section Fthrough asimilar device embodying the invention, but

showing two take-offs for the final reciprocatory motion;

' i Fig. 6 is a central longitudinal vertical section through another embodiment of the invention likewise applied -to a portable reciprocable sanding shoe or the like, and embodying anti-friction bearings for the various parts;

Fig. 7 is a transverse longitudinal section taken through the manipulating mechanism of the assemblage of Fig. 6; I

Fig. B `is an end view and transverse vertical.

seotiontaken through the assemblage of Fig. 6 along the line 8-8;

Fig. 9 is a transverse vertical section through the assemblage of Fig. 6 taken along the line 9 9, and showing the latch for releasing the improved meohanisms from the flexible drive shaft;

Fig. 10 is a central longitudinal vertical section through still another embodiment of the inf vention `also applied to a sanding shoe, and

wherein a multiple disk clutch is employed in-v stead of a'cone clutch as in Figs. 1, 2 and 6, and

also including various other improvements in its details of construction;

Fig. 11 is an enlarged central section through an improved anti-friction bearing for one of the knuckle arms;

Fig. 12 is a transverse section taken through the improved assemblage of Fig. 10, `alongthe line I2-I2 thereof, the sled shoe having been omitted;

Fig. 13 is a fragmentarytransverse section also taken through the improved assemblage of Figs. and 12, along the line |3-I3 of Fig. 12, and showing one improved type of clutch manipulating mechanism;

Fig. 14 is a similar section showing another improved type of manipulating mechanism;

Fig. 15 is an end view of an improved adjusting assemblage for the knuckle seat; and

Fig. 16 is a central vertical section through the assemblage oi' Fig. 15.

While the invention has been shown and described herein as being especially adapted for use in a mechanical movement for converting rotary into true reciprocating motion, it is not my desire or intent to thereby unnecessarily restrict the scope or utility of the improvement since the iinal motion need not be a truly rectilinear reciprocating motion but may. follow diverse patterns.

Referring particularly to Figs. 1 to 4, inclusive, the relatively simple embodiment of my improved mechanical movement shown therein comprises in general, an elongated supporting member or body Is having a bore I9 and a block 20 fixedly conned within the bore and provided with a spherical zone surface 2|; an eccentric 22 journalled for rotation within the bore I9 in axial alinement with the block 20 and having an eccentrically revolvable cylindrical socket 23 in one end, and a central tapered socket 24 in its opposite end; a reciprocable element or shoe 25 slidably but detachably mounted upon parallel rods 26 carried by the lower side portions of the body I8, and having therein a cylindrical pocket 21; a spherical motion transmitter or knuckle 28 seated against the surface 2| of the block 20 and being provided with rigid radiating arms 29, 30, of which the arm 23 has a spherical outer end 3| gyratable within the eccentric socket 23, while the other arm 30 has a similar spherical outer end 32 pivotally confined within the pocket 21; a

source of rotary motion such as a. drive shaft 33' journalled for rotation centrally within the body bore I9; a cone clutch member 34 splined for movement along the shaft 33 and being cooperable with the tapered socket 24 of the eccentric 22 to rotate the latter; a coil spring 35 normally tending to release the cone clutch member 34; a'nd a lever 36 and bell-crank 31 both pivotally suspended from the body Il and being manipulable to actuate the cone clutch.

The main portable body I3 may be formed of suitable metal and is preferably shaped for convenient gripping by the hand of an operator as indicated in the drawings, and as shown in Figs. 1 and 2, the reaction block 20 may be i'lxedly conned within the bore i9 by means of a snap ring 38 coating with an annular groove in the bore. The eccentric 22 may be journalled directly within a bearing sleeve 39 secured within the body bore I3 in any suitable manner, and the eccentric 22 also has a spherical zone surface 4U adjacent to the socket 23 therein and coacting with the sphere of the knuckle 23. The arms 29, 30, of the motion transmitting knuckle 28 may be y 4 rigidly attached thereto with, and the spherical arm end 3| coacts with a sectional bearing sleeve 4| which is freely rotatable and and slidable within the eccentric socket 23, while the other spherical arm end 32 coacts with another sectional bearing sleeve 42 which is confined within a cup-shaped element 43 by a snap ring 44, this cup-shaped element 43 being likewise freely slidable and rotatable within the shoe pocket 21. Universal motion transmitting connections are thus provided between the eccentric 22 and the arm 29, and between the other arm 30 of the knuckle 28 and the shoe 25; and while the arm end 3| is gyratable about the central axis of the bore I9, the movement of the other arm end 32 is confined to rectilinear oscillation in a plane parallel to the shoe guiding rods 26. The reciprocable element or shoe 25 may be provided with a face plate 45 to which sand paper or the like may be attached in any suitable manner, and this shoe may also be made detachable from the rods 26 in various ways.

The main driving shaft 33 is journalled for rotation in acial alinement with the bore I3 of the body I8, in a bearing 46 which is normally held in place by another snap ring 41, and the cone clutchmember 34 is slidably secured to the inner end of the shaft 33 by means of a spline 48, see Figs. 1, 2 and 3. The outer end of the shaft 33 may be bored as indicated in Fig. 3, and is provided with a pin 49 spanning the shaft bore. In order to make the improved assemblage freely movable in all directions as well as portable, a

exible driving shaft 50 which is rotatable at relatively high speed by means of an electric motor or the like, may be utilized, and the end of this flexible shaft 50 is provided with a bifurcated fitting 5I which is detachably cooperable with the pin 49 as shown. The flexible shaft end fitting 5| is rotatable within a cap 52 screw threaded into the outer end of the bearing 46 so that the shaft 53 may be readily detached or connected to the shaft 33; and a sealing device 53 may be interposed between the shaft 33 and the bearing 46 in order to permit suitable lubricant to be confined within the body bore I'S. The clutch member 34 is rotatable within a medially grooved sleeve 54 which is slidable within the enlarged end of the bore I9, and the compression spring 35 is interposed between the xed bearing sleeve 39 and the adjacent end of the sleeve 54 and tends to constantly disconnect the cone clutch.

The medial portion of thesleeve 54 is provided with an annular groove 55 with which the depending arms of the bell-crank 31 coact, and this bell-crank 31 is swingably suspended from a pivot pin 55. secured to the body I8. The manually operable lever 36 is also swingabiy suspended from the body I8 by anothervpivot pin 51, and has a pair of medial projections 58 which are cooperable with the laterally extending arm of the bell-crank 31, so that pressure applied to the lever 36 by the palm of the operators hand will cause the bell-crank 31 to compress the spring 35 and drive the conical clutch member 34 into the tapered socket 24, thus frictionally connecting the eccentric 22 to the constantly rotating power or drive shaft 33. However, when the pressure on the lever 36 is released, the spring 35 will become quickly effective to release the friction cone clutch, and the power and'motion transmission is thus immediately interrupted.

During normal operation and use of the imor i'ormed integral therel prises an outer sand paper or the like, and the main shaft 33.

may be rotated "continuously from any suitable source of power such as an electric motor, through the flexible shaft 58. The operator may then grip the body I8 and in order to produce rapid reciprocation of the shoe 25, it is only necessary for the operator to apply pressure to the lever 36 with the palm ot his hand. Due to the flexibility of the shaft 50, the 'improved unit .may obviously be placed in any desired position and moved from place to place, and when the lever 36 is pressed toward the body I8, the bell-crank 31 will move the cone clutch member 34 into the tapered socket 24 and will produce rapid rotation of the eccentric 22 about the central longitudinal axis of the bore I8. The knuckle arm 29 will then be gyrated or revolved about a conical path having its apex at the center of the spherical knuckle 28, and since the arm 30 is formed rigid with this knuckle, this arm 30 will tend to wobble. The shoe is however guided for rectilinear reciprocation by the guide rods 26 so that the spherical end 32 of the arm 38 cannot move laterally and can only move in a plane parallel to the rods 26. The shoe 25 is thus rapidly reciprocated during revolution of the arm 29 and its spherical end 3|, and the knuckle 28 will remain seated against the surface 2| during such conversion of the rotary motion of the shaft 33 into reciprocating motion of the shoe 25. Immediately upon release of the pressure on the lever 36, the compression the motion of the eccentric 22 and of the shoe will then cease. It will thus be noted .that the rotary motion of the shaft 33 is effecments or mem ers instead of one. In this speciilc modification of the invention, the body 58 comtubular casing 59 having concentric but axially separated end members 60. 6| secured therein to provide a sealed intermediate chamber 62. The modified motion converter or chamscrew threads 6 5, and by another element 66 screw threaded into the member 6| and coacting with the opposite side of the spherical body of ably coniined within bushings 15 which are se- A cured to the fixed end member 60, and the outer end of each plunger 12, 13 is lprovided with a function to release the driving con? f.

reciprocate.

, tends to separate the friction clutch members 18 .detachab'ly connected to notch 16 for effecting attachment thereof to a pump piston or other device which it is desired to The eccentric 88 is concentrically of the friction or ball bearing 11 and has a tapered or conical clutch member 18 rigidly attached to its end remote from the eccentric socket 68, and this end of the eccentric 69 is also provided with a central bore having therein a, ball 19 and a plunger 80. Another clutch member 8| having a journalled for free rotation v tapered socket formed to frictionally engage the conical portion of the member 18, is mounted upon a driving shaft 82 which is journalled for rotation within another anti-friction or ball bearing 88 carried within a tubular casing 84 secured to the body member 6|; and the inner end of the drive shaft 82 is slidably confined within the -cen-- trai end bore of the eccentric 69 and is provided with a plug 85 coacting with one end of a compression spring 86 the opposite end of which bears against the plunger 80. This spring 86 constantly 8|, and the ball bearings 11, 83' are of the type which will effectively resist the end thrust induced by the spring plus the force resulting from the operators hand engaging the clutch lever. The casing 84 is detachably secured to the member 6| by means of a ring nut 81 and is provided with a seal 88, and the drive shaft 82 may be a source of rotary motion in any desired manner. Since the drive shaft 82 is :tixedV against axial displacement, the eccentric 68 and clutch member 18 must be shifted axially in order to eiTect actuation of the cone clutch, and such shifting of these parts is made possible by an annular lever or prevented from moving out of the common plane olf, th? axes of the plungers 12, 13, these arms 12, 13 to devices such'as pump be rapidly and conknuckle 63, within-an anti-v lubricant within the chamber 92, and the members 94, 99 which coact with the spherical body of the knuckle 93 may be readily adjustedso as to eliminate excessive play. Upon release of the lever 9|. the spring 99 will obviously become quickly effective to disconnect the cone clutch, and the/ball 19 and plunger 99 will permit free rotation of the drive shaft 92 whenever the clutch is thus disconnected.

ReferringV especially to Figs. 6 to 9 inclusive, the modified portable motion converting and transmitting mechanism shown therein is of the anti-friction bearing type shown in Fig. 5, but embodies additional renements such as improved latches for readily connecting and disconnecting the rotary drive shaft and the reciprocated devices. In this assemblage the body 94 is formed of a single piece of metal having an internal chamber 95 which is normally sealed by a lower plate 96 and with which a motion converter or knuckle 29 is confined by means of the seating members 64, 66 which are accessible for convenient adjustment upon removal of the plate 96. eccentric socket 69 which coacts with the spherical end of one radial arm 29 through a split sleeve 4|, and also has a cone clutch member 19 rigidly attached thereto as in Fig. 5, these elements likewise being mounted for free rotation in a ball-bearing 11 carried by the body 94. The spherical end of the other radial arm 39 of the knuckle 29 coacts with an openingvin the inner end of a reciprocable rod or plunger 13 through a bushing 14, and the outer end of the plunger rod 13 has a lateral notch 16 while the medial portion thereof is slidable within a fixed bushing 15 secured to the body 94.

As shown in Figs. 6 and 8, a reciprocable shoe 91 is slidably mounted upon the opposite side edges of the lower plate 96 and has a lower plate 45 for facilitating attachment of sand paper or the like thereto, and this shoe 91 is reciprocable longitudinally of the body 94 and parallel to the plunger rod 13. The end of the shoe 91 nearest the outer end of the rod 13, is provided with upright guides 98 within which a latch 99 is vertically slidable, and this latch 99 has an opening |99 of larger diameter than that of the rod 13, the lower portion of which is adapted to engage the notch 16, see Fig. 6. The latch 99 is urged upwardly by means of a coil spring |9| and is prevented from leaving the guides 99 by a stop pin |92. In order to -drivingly connect the shoe 91 to the rod 13, it is only necessary to press the latch 99 so as to permit the rod 13 to enter the opening |99 and to thereafter slide the latch along the rod so as to permit the parts to interlock as in Fig. 6, and release of the shoe 91 may be just as readily effected by merely pressing the latch 99 downwardly against the spring |9| and by subsequently withdrawing the latch from the rod end and the shoe from the plate 96.

The hollow drive shaft 92 of the assemblage shown in Figs. 6 to 9, inclusive, is similar to that of Fig. 5, and is provided' with an internally tapered clutch member 9| which is frictionally cooperable with the cone member 19. The clutch members 19, 9| are normally disengaged by a spring 86, and the shaft 82 is mounted for free rotation in a ball bearing 93 carried by the removable casing 84, and has a polygonal central socket which is slidably engaged by a similarly polygonal plug firmly secured to the end of a flexible driving shaft 59 similar to that shown in Fig. 3 and which is adapted to be continuously The eccentric 69 of this embodiment has an' rotated at high speed from any suitable source of power. The armor of the flexible shaft 59 is provided with a special end fitting 94 as shown in Figs. 6 and 9, within which the shaft 59 is freely'rotatable and which is swivelled in the casing 94, and the fitting |94 has a peripheral annular groove |95 therein. A latch |96 which is swingably suspended from the casing 94 by means of a pivot pin |91, is constantly urged toward latching position by a spring |99, and when this latch engages the fitting groove |95 as in Fig. 9, the drive shaft 92 is drivingly connected to the power or driving shaft 59 and the plug |93 is held within the drive shaft socket. These parts may however be quickly disconnected by merely pressing on the latch |96 so as to compress the spring |99 and by subsequently sliding the fitting |94 out of the socket.

The eccentric 69 of the modified structure of Figs. 6 and '1 is provided with a clutch shifting plate 89 which normally engages a stop pin 92 as in Fig. 5, but which may be shifted to engage the cone clutch members 19, 9|,.with the aid of a composite plunger rod 99 and a manually operable bent lever 9| as shown in detail in Figs. 6, 7 and 8. The plunger rod 99 is slidable within a bore in the body 94, and the bent lever 9| is pivotally mounted upon an adjustable fulcrum 93 which is screw threaded for adjustment within the body 94, and a loose pin connection |99 is provided between the rod 99 and the lever 9| so as to prevent binding. The lever 9| is bent so as' to permit convenient manipulation thereof by the thumb of the operator while gripping the b ody 94, and the plunger rod 99 and bushing 15 are preferably provided with lubricant seal rings as shown. l

The normal operation of `the modified embodiment of the invention shown in Figs. 6 to 9 inclusive, is substantially the same as those of Figs. l and 5, and when the lever 9| is released, the cone clutch will be disconnected by the spring 88 and the drive shaft 82 will rotate idly. However, when the lever 9| is pressed toward the body 94, the plunger rod 99 will press against the disk or plate 99, thereby compressing the spring 96 and connecting the cone clutch, thus causing the eccentric 69 to rotate and to gyrate the knuckle arm 29 about a conical path. This gyratory motion is converted by the knuckle 29 into oscillating motion of the other knuckle arm 39 which is confined to oscillation in the plane of the rod 13 by the guide bushing 15. The rod 13 is thus reciprocated and its reciprocating motion is transmitted to the shoe 91 through the latch 99 in an obvious manner. The shoe 91 may be quickly and conveniently removed by merely manipulating the latch 99, and the entire assemblage may likewise be disconnected from the power source by manipulating the other latch |96.

Referring particularly to Figs. 10 to 13 inclusive, the further modified and improved embodiment of the invention shown therein utilizes a disk type of clutch instead of a cone clutch, and also incorporates additional anti-friction bearings and guiding means for insuring smooth and eilicient operation of the mechanism. In this improved unit, the elongated main frame or body ||9 is provided with a chamber III at one end within which a seating block I|2 for the knuckle 29 is adjustably confined by shims l|3 and an end closure cap ||4; and is also provided with a bore |I5 at its opposite end for removably confining the eccentric II6, the-drive shaft |l1 and a disk clutch. The motion converter or knuckle 26 is disposed between the block ||2 and a plate H8, and the spherical outer end of the knuckle arm 29 coacts with an eccentric socket formed in the eccentric ||6, through a special anti-friction or ball bearing assemblage comprising separable ball races ||9. |20 normally held together by a snap ring |2|. and lannular series oi' balls |22 interposed between the races H0, |20 and thev spherical end of the gyratory arm 26, see Figs. 10 and 11. The adjacent portion of the eccentric I|6 is mounted for free rotation in a roller bearing |23. and the opposite reduced end of this eccentric is confined within a central bore o f the drive shaft ||1 while the medial portion thereof has a shifting plate |24 secured thereto.

The oscillatory arm 30 of the knuckle 28 coacts with a cylindrical through opening in a modified reciprocable motion transferring rod |25, through a split bushing 14, and the rod |25 is guided for reciprocation within a bushing |26 and a bore |21 associated with the body ||0. In order to .prevent possible rotation of this rod |25 about its own axis, the end thereof which is slidable in the bore |21 is made semi-circular as shown `in Fig. 10, and a semi-circular pin |26 is disposed across the bore |21 with its fiat face engaging the flattened rod end. The outer end of the rod |25is provided with a notch 16 adapted for coaction with a releasable latch |20 which is similar to the latch 99 and is slidable in guides |30 formed on the reciprocable shoe 31, by means of a spring 10|, and is also guided by a pin |3|, `and this latch |29 may be urged toward released position by the hand of the operator. The reciprocable shoe 01 may be slidably and removably suspended from the lower closure plate 96, and may also be provided with a sand paper attaching plate 45 as previously explained.

The friction disk clutch which is confined within the body bore I|5 comprises a series of parallel plates |32 which are splined to the eccentric ||6 and another series of intervening parallel'plates |33 which are likewise splined within a cup-shaped extension |34 of the drive shaft I l1, and these plates |32, |33 are compressible between the collar or plate |24 carried by the eccentric and another collar |35 coacting with the shaft i |1 within the extension |34. The drive shaft ||1 is mounted for free rotation within and is prevented from shifting axially by a ball bearing |36 carried by the body 0; and is detachably drivingly connectible to a driving plug |03 firmly -secured to the end of a flexible shaft 50, by means of a latch |06 engaging the groove |05 of a swivel fitting |04, as shown in Fig. 9. This latch |06 is pivotally suspended from a modified tubular end casing |31 by means of a pivot pin |01, and the casing `|31 is detachably secured to the body by a ring nut 61. l

A helical compression spring 06 disposed within a central bore of the eccentric I5, and which presses against a plunger |36 and ball |39 coact ing with the end of the drive shaft ||1, serves to normally release the disk clutch, but this clutch may be engaged by means of a disk |40 coacting with the plate |24 through an annular series of anti-friction balls |4|. As shown in Fig. 13, a lever ring or plate |42 similar to the ring 69 of Figs. and 6, is mounted within the bore ||5, and this annular plate loosely surrounds the eccentrc I6 and has its medial portion provided with dametrically opposite projections |43 which bear against the plate |40. The edge portion of the plate |42 on one side of the projections |43 is 10 fulcrumed against an inner ange |44 of the body H0, and the diametrically opposite edge portion of the plate is adapted to be engaged by a pin 45 which is slidable by means of a lever |46 swingably suspended from the lower side portion of the body ||0 by a pivot pin |41. The lever |46 carriesa plunger |43 pressed outwardly by a. spring |46 and the outer end of which is directly engageable with the adjacent end of the pin |45 as shown in Fig. 13. When the lever |43 has been swung by the thumb of the operator, in contact with the body Il as shown, the spring |46 wil1 force the pin |45 against the lever plate |42 and this plate |42 will force the disks |32, |33 of the friction clutch into intimate contact with each other thereby imparting rotary motion from the drive shaft H1 to the eccentric I6; but'when the lever |46 is released, the spring 36 will quickly separatethe disks |32, |33 and the spring |43 will cooperate to swing the lever |46 outwardly away from the body ||0 and against a stop |50, thus moving the parts into inactive position.

A modified lever assemblage for actuating the disk friction clutch, is shown in Fig. 14, wherein the lever, plate |42 is likewise swingable to engage the clutch disks |32, |33, by means of a slidable spring pressed pin |45. In this modifica.- tion the outer end of the pin |45 is engaged by a compression spring |5|, and the thumb lever |46' which is swingably suspended from the body ||0 by a pivot pin |41, engages a button block |52 secured to the outer end of the spring |5|. The operation of this modification is the same as in Fig. 13, and the lever |46' may be omitted so as to permit direct application of the thumb pressure to the button block |52, il so desired.

During normal operation of the improved mechanism specifically shown -in Figs. 10 to 14 inclusive, the shoe 31 may be drivingly connected rto the outer end of the guide rod |25 with the aid of the latch |20, and the end plug |03 of the driving shaft 50 may likewise be drivingly connected to the shaft il and thus maintained with the aid of the latch "il:` coacting with the swivel fitting |04. The constantly rotating drive shaft ||1 may then be quickly connected to the eccentric I6 by manipulating the thumb lever |46 so as to engage the'clutch disks |32, |33, and when the eccentric ||E is rotating it will again gyrate the knuckle arm 23 about a conical path, and will simultaneously osclllate the other knuckle :arm 30. Since the rod |25 -is positively confined to reciprocating motion, the Ioscillating motion of the arm 30 of the knuckle 28 will produce reciprocation of the rod |25, and the half pin |26 will prevent possible rotation of the rod |25 about its own axis i The ballbearing assemblage shown in Fig. 11 and which .is applied to the gyrat'ing arm 29 of the knu-ckle 28, will reduce the friction and will eliminate excessive heating of the coacting parts, and the roller bearing I 23 and ball bearing |36 will further reduce the friction losses. The use of the disk .clutch instead of a cone clutch as in the previously described embodiments of the invention, also eliminates possible slippage and possible misalinement, and the provision of the lever |46 for manipulating this clutch also facilitates normal operation of the unit.

It may become desirable to adjust the yseating and the confining pressure on the motion converter or knuckle 23, either during initial setting or after the assemblage has been operated for some time and` the parts have become worn, and such adjustment may be accomplished either by the use of slums H3 as shown in Fig. 10, or with 1 1 an improved mechanism such as shown in Figs. and 16. The knuckle 28 of -this mechanism has the arm 29 thereof formed integral and concentric with the main sphere, while the other arm 30 is rigidly attached to the main .sphere by means of a pin |53 pushed into the knuckle 28in axial :alinement with the arm 28 and piercing an integral shank |55 of the arm 30. 'I'he main spherical body of the knuckle 25 coacts with a polygonal reaction block or seating member |55 having a spherical seating surf-ace |55, and the corners of which are screw threaded for adjustment within an internally threaded ring |51, and this ring |51 is adapted -to be fastened to the main body of any of the assemblages in any suitable manner as with Aa snap ring 38 in order Vto prevent axial movein upper and lower pairs as viewed in Fig. 15, and

a pin |59 is insertable in any one of these holes v|58 whenever a side face of the member |55 is disposed perpendicular to the -axis of the pin receiving hole. The'axes yof the holes |58 of each pair arel disposed forty-live degrees apart, and the nearest holes |58 of the two pairs have their axes disposed one hundred twelve and one-half degrees apart, so that the locking pin |59 may be dropped -in the various holes |55 and caused to cooperate with the four sides of the member |55 so as to provide sixteen diierent -positions of adjustment each twenty-two and one-half degrees apart 'measured circumferentially. The member |55 may be provided with a screw threaded centrai socket |60 for eiiecting removal thereof. and this improved assemblage obviously provides means for quickly and accurately adjusting the reaction block or member |55 in order to properly position the knuckle 28.

From the foregoing detailed description it will 'be apparent that my present invention provides a simple, compact and highly emcient mechanism for converting high speed rotary motion into reciprocating motion of a shoe or other device, The spherical knuckle in each case is seated for univors'al movement in a reaction block or member,

and is provided with a gyratory arm 29 and with one or more oscillatory arms al1 of which radiate from the main spherical body of the knuckle. 'I'he outer ends of these radiating arms are -in each case engaged by the -adjacent parts so as to prof' iii-able body upon which the reciprocating shoe or other device maybe properly guided, and which iszconveniently detachable from the power source and is freely movable without undue effort. The

use or anti-friction bearings for the drive shaft.

eccentric and other parts, will reduce friction losses .to a minimum, and will also eliminate ex-. cessive heating, and the relatively small and delicate parts of the mechanism may be conned within lubricant for proper lubrication and are also thoroughly protected against damage due to reckless use of the assemblage. By constructing the lower plate 95 of heat insulating material, heat resulting from the sliding 0f the $1199 45 may all be prevented from reaching the knuckle 2B, thus further preventing possible over-heating. The various parts of the mechanism while being thus safely coniined during normal operation, are still readily accessible for inspection, and may be conveniently assembled or dismantled, and by utilizing a flexible driving shaft 50 associated with the power source and detachably connected to the motion converting mechanism, the improved unit may obviously be manipulated and freely disposed in any desired .position remote from the actual source of power without undue effort. It is noteworthy that the outwardly projecting arms of the knuckle 2l, may extend in any desired direction away from the center of the main sphere, and that there may be any number of these motion transmitting arms provided. 'I'he improved assemblage has proven highly satisfactory and successful in actual operation, especially as applied to saws and sanding mechanisms, and functions without' undesirably vibrating the main body which is normally gripped by the hand of an 0perator.

It should be understood that it is not desired to limit this invention to the exact details of construction or to the precise mode of use. herein shown and described, for various modifications within the scope of the appended claims may occur to persons skilled in the art.

I claim:

1. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore, a reaction block having a spherical zone socket disposed coaxial with said bore, a knuckle having a pivot sphere oscillatable within said socket and being provided with a pair of rigid arms each having a spherical swinging end, one of said arms projecting laterally away from said bore and the other projecting longitudinally into said -bore and away from said block, means for positively confining said laterally projecting arm to swinging motion in a plane, and an eccentric coniined within said bore and rotatable about the bore axis and coacting with the other of said arms to gyrate the same. 4

2; In a mechanism for converting rotary motion into reciprocating movement, a body having a bore, a reaction block having a. spherical zone socket disposed coaxial with said bore, a knuckle having a pivot sphere oscillatable within said socket and being provided with a pair of rigid arms each having a spherical swinging end, one of said arms projecting laterally away from said bore and the other projecting longitudinally into said bore and away from said block, means for positively confining said laterally projecting arm to swinging motion in a plane, an eccentric conned within said bore and rotatable about the bore axis and coacting with the other of said arms to gyrate the same, and a clutch also confined within said bore coaxial with said eccentric and said socket for detachably connecting the leccentric with a source of rotary motion.

3. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block confined in one end of said bore and having a spherical zone socket facing and disposed coaxial with said bore, a knuckle having a pivot sphere oscillatable within said socket and being provided with a pair of rigid radial arms each having a spherical swinging end, one of said arms projecting laterally away from the bore axis and the other extending longitudinally of said axis and away from said socket, means for positively connning said laterally projecting arm toswinging motion in a plane containing said bore axis, and an eccentric journalled in said bore for rotation about the bore axis and coacting with the other of said arms to gyrate the same.

4. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block confined in one end of said bore and having a spherical zone socket facing and disposed coaxial with said bore, a knuckle having a pivot sphere oscillatable. within said socket and being provided with a pair' of rigid radial arms each having a spherical swinging end, one oi said arms projecting laterally away from said socket, means for positively confining said laterally projecting arm to swinging motion in a plane containing said bore axis, an eccentric journalled in said bore for rotation about the bore axis and coacting with the other of said arms to gyrate the same. and a clutch confined in the opposite end of said bore coaxial with said eccentric and said socket for detachably connecting the eccentric with a source of rotary motion.

5. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block co'nned in one end of said bore and having a spherical zone socket facing and disposed coaxial with said bore, a knuckle having a pivot sphere oscillatable within said socket andy being provided with a pair of rigid radial arms each having a y spherical swinging end, one of said arms projecting laterally awayfrom the bore axis and the other extending longitudinally of said axis and away from said socket, means for positively conning said laterally projecting arm to swinging motion in a plane containing said bore axis, an eccentric journalled in said bore for rotation about the bore axis and coacting with the other .of said arms to gyrate the same, and a clutch confined in the'opposite end of sald'bore coaxial with said eccentric and said socket for detachably connecting the eccentric with a source of rotary motion, said block and said clutch being removable from said bore through the respective adjacent bore ends.

`6. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block coniined in one end of said bore and having a spherical zone socket facing and disposed coaxial with said bore, a knuckle having a pivot .sphere oscillatable within said socket and being provided with a pair oi rigid radial arms each having a spherical swinging end, one of said arms projecting laterally away from the bore axis and the other extending longitudinally of said axis and away from said socket, means for positively confining said laterally projecting arm to swinge ing motion in a plane containing said bore axis,

and an eccentric journalled in said bore for rotation about the bore axis and coacting with the other of said arms to gyrate the same, said eccentric bearing directly against the pivot sphere of said knuckle remote from said block socket.

7. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block confined in one end of said bore and having a spherical zone socket facing and disposed coaxial with said bore. a knuckle having a pivot sphere oscillatable within said socket and being provided witha pair of rigid radial Iarms each having a spherical swinging end, one of said arms projecting laterally away from the bore axis and the other extending longitudinally of said axis and away from said socket, means for effecting` adjustment ofl said block longitudinally of said bore to insure surface coaction between said pivot sphere and said socket, means for positively coniining said laterally projecting arm to swinging motion in a plane containing said bore axis, and an eccentric journalled in said bore for rotation about the bore axis and coacting with the other of said arms to gyrate the same.

8. In a mechanism for converting rotary motion into reciprocating movement, a body having a bore extending therethrough, a reaction block an eccentric journalled in said bore for rotation about the bore axis and coacting with the other Tof said arms to gyrate the same, a clutch coniined in the opposite end of said bore coaxial with said eccentric and said socket for detachably connecting the eccentric with a source of rotary motion, and means at the side oi said bore opposite to that pierced by said laterally projecting arm for effecting actuation of said clutch. WILLIAM A. TRAUT.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Haumann Nov. 23, 1937 

